1666995050 has 24 divisors (see below), whose sum is σ = 3543555936. Its totient is φ = 571541040.

The previous prime is 1666995047. The next prime is 1666995059. The reversal of 1666995050 is 505996661.

It is a junction number, because it is equal to n+sod(n) for n = 1666994986 and 1666995004.

It is not an unprimeable number, because it can be changed into a prime (1666995059) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2381072 + ... + 2381771.

It is an arithmetic number, because the mean of its divisors is an integer number (147648164).

Almost surely, 2^1666995050 is an apocalyptic number.

1666995050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1666995050 is an abundant number, since it is smaller than the sum of its proper divisors (1876560886).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1666995050 is a wasteful number, since it uses less digits than its factorization.

1666995050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4762862 (or 4762857 counting only the distinct ones).

The product of its (nonzero) digits is 437400, while the sum is 47.

The square root of 1666995050 is about 40828.8507063326. The cubic root of 1666995050 is about 1185.7089646818.

The spelling of 1666995050 in words is "one billion, six hundred sixty-six million, nine hundred ninety-five thousand, fifty".